What to do about North Korea?

[Isis]

Either we just wait for the regime to collapse on its own, or we go to war with them. That could potentially spark a conflict with China, although China's relationship with North Korea seems to have been getting worse over the years. They recently placed sanctions on North Korean coal (their main export) but the West may have to make some sort of deal with China to convince them to abandon North Korea.

Peacefully or violently, it will be one massive expensive mess and it will be our countries that will have to pay the price to clean up the said mess. There is absolutely no way South Korea could handle the refugee crisis that would ensue on their own.